Screening-machine.



D L. KILLER.,

SGLLLNING MACHINE. APPLICATION FILED 00T. 30,'1911.

Patented June 10, 1913.

SSHEETS-SHEET 3.

www4,

15 iff;

incassi.

yrfrivr 'DANIEL L. KIBLER, or GRAND Barros, MICHIGAN, assis-Non To ACME voiifiumv'r rLasrEn co., or sr. Louis, MISSOURI, A conronarroiv' .or MISSOURI.

scieEiiNIive-iviaoiiiiin.

T aZZ'wwm mu/,y concern Beit known that vDANIEL L. Kieran, a

4 citizen of the Unitedv States of America. re-

v screening machines and more particularly to machines adapted to separate fine grades of cement or plaster from the coarser grades, and its object is to provide a machine which p4 is `simple inconstruction and operation, easily-accessible for inspection or repairs and one which will operate rapidly and to `provideV the"l device with various new and useful features ihereinafter more fully described and particularly pointed out in the claims, reference being had to the accom- `1 f 'panying' drawings, in which:-

i Figure l is av sectional elevation of the yupper portion of. a device embodying my invention; Fig. 2 'the same of the lower part, of the same; Fig. 3 a plan view of one section of the -inachine with the top removed; Fig. .tris a sectional elevation on the line ,4 4 of'Fig. l; Eig. '5 is .al Side elevation of the device with a portion removed; and Fig. 6 is a sectional plan on the line 6-6 of Fig. Q showing the conveyers atthe bottom of the machine. i

Like numbers referto like part-s in all of the figures. I

is the case or frameof the machine which is an elongated box-like structure inclined from-the vertical at an angle preferably of about 300. At the upper end of this case and extending transversely 4across its width is a feeding conveyer 2. This conveyer is of the screw type and one side of the box or trough in which it rotates is made lower to allow the material to spill over the side and be deposited upon the screens below. This lowered edge is higher at the incoming vend of the conveyerand gradually slopes downward to the opposite end so that the material will be evenly distributed ffthroughout the width of the casenaiid is preferably. provided with an adpistable member' 8 to insure this even distribution.

the case.

Specification of Letters ratent. Patented June l0, glg. Application filed October 30, 1911. Serial No. 657,486.

Beneath thisoonveyer isa series of screens 5 which extend across the case l being pivotallyatt-ached to the case at their upper ends and spaced away from the bottom ot' y The lower ends of the screens are spaced apart still farther from the bottom of the case andv overlap. the upper end of the screen nextbelow', each screen being supvported atthe lower end upon vibrator wheels (S which are mount-cd on rotative shafts 7 extending outside of the case and driven by any convenient means.

Beneath the lower edge of each screen a defiector board'8 is arranged to divert the fall of the material that passes over this screen above and changes the course of said niaterial so that it will strike the upper part of the next screen below'. The upper portion of each screen is provided with a strip of sheet metal 4 upon which the'material strikes first as .itl escapes from the lower edge of the detlector board; The balance of the screen is preferably formed Iof an open woven fabric 9 which will, permit the liner grades of material to pass' through, the coarser grades passing over the first screen and onto the next screen below. 'l

In order to prevent the screens from becoming clogged a rock shaft lO is provided which extends beneath the lower end of the screen and a bar formed of 'a strip ofwood ll is mounted upon this shaft in which is fixed a series of wire loops l2 which extend directly beneath the screen yand at intervals as the shaft l0 is oscillated these wire loops strike the screen jarring loose any material which may become clogged in it.y rlhe vibratory movement imparted to the screen by the rotation vof the vibrator wheel 6 also tends to keep the screen open and jar the finer grades of material through it.

The mechanism which'operates the .rock shaft lO preferably consists of a lever 13 pivoted at its lower end and engaged inter mitteiitly at its upper end by an arm lll attached to a rotating shaft l5.. As the arm la engages the upper end of the lever 13 the lever l is moved a short distance and when disengaged it is moved back by a spring 16 against a stop pin 1T. A cable v18 attached to the lever i3 passes over a pulley 19 and is attached to a connecting rod 20. lThis connecting rod extends downward outside the case and one end of each of a series of levers 21 is pivotally attached to' said connect-ing rod. The other end .of each lever 21 is attached to arespective rock shaft 10. v- As the lever 13 is operated by the arinlli movement is transmitted to each lever 21 and rock shafts 1() causing the loops of wire 12 to alternately move away from the screens and iiy backward striking the,

screens. The levers 21 counterbalance they' l@ rods 20, serving as counter-balancing' weights. They counter-balance the wire/ loops on therock shafts so that when the lever 13 is released the loops are swung` against the screens. The spring 22 engaging thel rod' 20 holdsthe loops normally clear of the screens. lWhen the arm 1d shifts the lever 13 the cable 18 pulls the rod 2() upwardly. This rod 2O being connected to the levers 21 and the latter in turn con- 20 nected to the shafts 10, the latter are rocked Immediately upon release of the lever 13 by the 'arm v111 and a quick return movement. of the lever 13 by the spring 16 into engagement with the stop 17, the rod 20 falls and consequently the shafts are rocked, causing, theloops 12 to strike against the screens; A cushion spring 22 is provided at the lower end of the machine against which the lower end oi the connecting rod 2 0 cushions on' its downwardmovement.

The finer grades of material 'which have passed through the screens fall'upon the bottom of the case 1 and slide down its inclined surface into the conveyer 23 bywhich it is carried away to be packed 'for ship- 'ment The coarser grades .after passing over each successive screen finally drop into the'convey'er 24 which carries them to a spout 25 to be conveyed to a machine :for re-grinding.

The top of the case l'isy provided with hinged doors 26 so that the interior oi' the machine may be inspected at any time.-

The pivotal connection at the upper edge of the screens consists of hook shaped members 27 attached to the under side of the screen which hooks pivotally engage stud ,bolts-28 secured tothe sides of the case and as the lower edge of' each screen is supported, upon a vibrator ratchet wheel 6 the screen -may be easily removed from 'the case by raising` it enough to unhook' the hooks 27 from the studs 28.

AThat I claim is 1. A screening machine, comprising an incli'ned case, inclined screens in the case pivotally attached at their upper ends to the `sides of the case and arranged one above the other with thc lower edge of each screen 60 overlapping the upper edge of the screen below, shafts `journaled in the case 1nd eX- tending beneath the lower edge of each screen, vibrator wheels on the shafts to support the lower ends of the screens, means for i5 rotating the shafts, beaters beneath the nosa,

.for periodically raising the counterbalance screens, means for operating the beaters, and delector boards beneath the lower edge of each superposed screen. l

2. A screening machine, comprising a. screen, a rock-shaft below the screen, beaters projecting laterally from theshaft to strike the screen and arranged normally in spaced relation to the screen and parallel therewith, a counterweight to swing the'beaters against the screen, and means for periodically-.turning the rock-shaft to move the heaters away from the screen and for releasing'the shaft to permit the beaters to Istrike the screen.

",3. A screening machine, comprising a screenpa rock-shaft near the screen, beaters extending laterally from the shaft and normally'near the' screen, a counterbalance to swing the beaters against the screen, means and releasing tne same,4 and a cushion spring vto support the counterbalance and hold the beaters `in normal position.

y a. A screening machine, comprising a screen., aroch-shaft beneath the screen, beat.- ers attached to the shaft and normally held thereby close to the screen and parallel therewith, an arm on the rock-shaft serving as a counterweig'ht, means connected to .the arm to periodically raise' the arm and to release the lsame to first move the beaters away from the screen and then allow-the same to strike the screen.y

5. A screeningmachine, comprising a seV ries of inclined screens, a rock-shaft vloeneath each screen, beaters extending laten ally from nachy shaft, and disposed normally vparallel with the screens, an arm on each shaft, a rod connecting the arms, said arms .and rod serving toy overbalance the beaters les and swing them against the screens, and means for periodically raising the rod and arms and releasing the same, to swing the beaters against the screen.`

' -v 6. A screening machine, comprising a se- 110 ries of screens, a rock-shaft beneath each screen, beaters laterally projecting from each shaft and normally close to the screens,

an arm on each rock-shaft, a rod connecting the arms, a cushion spring engaged by the rod, a lever connected to the rod to move the same in one direction, an arm to engage thc lever to move the same and raise the connecting rod, and to release the same to release the connecting rod.

7. A screening machine, comprising a frame, a series of screens in the framdroclt shafts adjacent 'to each screen and extending outside of the case, oscillatory heaters on the said rock shafts, a lever on cach rock '125 shaft. a connecting rod pivctally attached to each lever, a cushion spring at the lower end of the connecting rod, a lover pivotcd at one end, a stop pin engaged by said lever, a spring to yieldably hold the said pivoted 130 -pivoted lever withl the connecting vrod to clinetl case, pivotallyl mountedy inclined screens inV thecase arranged-'one above'the.

tudinally 'movable connecting rod connected lever against the stop pin, an rmmounted on :t rotative :shaft to intermittently engage the'pivoted lever and a' cable to connect 'the intermittently oscillate the beaters. A S. A screenin` maclnne comprlslng an mother, means for 1 vibrating the Screens, e rock shaft extending beneath'the lower por# tion of each screen and projecting outside'of. the case, heaters carried. by the rock shafts, arms on the ends' of therock shafts, a longitov the outer lends of each of saidv arms and .the screens. y 'In testimony' whereof I alix my signature adapted to hold-*said ro'ekshafts normally `againstl rockigmovement-With the beters normally spaced from -the screens and normally in parallel-Hem with the 1atter,- and means opera-ble to liftsaid'connecting rod 20 and drop it intermittently so as to rock said' rock shafts and c a'use'the bea'tersfto strike A'ILIARQLD O. VAN Am'mvERP,v

LUTHER V. MoULToN. 

